# Why your bank's app can't show the whole picture > Bank apps have improved enormously and still cannot answer the question you have. The reason is structural, not a matter of the feature being missing. Source: https://trybica.com/guides/bank-app-vs-aggregator/ Updated: 2026-08-18 --- Bank apps have got genuinely good. Most now show a spending breakdown, flag recurring payments, and draw a chart of the month. It is a fair question why you would want anything else. The answer is not that the bank's version is badly built. It is that the bank can only see its own accounts, and almost nobody's financial life fits inside one bank any more. ## What the bank cannot see Your bank's category breakdown is calculated over the transactions that passed through your bank. That sounds obvious until you follow what it does to the numbers. If your salary arrives at one bank and you spend from a card at another, the first bank shows a huge income and almost no spending, and the second shows spending with no income at all. Neither is wrong. Both are useless. It gets worse with transfers. The €600 you move to your savings account every month is, from your current account's point of view, indistinguishable from spending €600. From the savings account's point of view it is income. Every bank app in the country will happily count both, and there is no fix available from inside a single bank, because the other side of the transfer is somewhere it cannot look. ## The merchant names problem The other limit is naming. Banks pass through the description that arrives on the payment rail, which is why a statement is full of lines like a terminal code, a city, and a number. Some banks tidy up the largest merchants and leave the rest. This is not laziness — the raw data really is that bad — but it means a category breakdown built from those lines has to guess, and it guesses conservatively. That is where "Other" comes from, and "Other" is usually the biggest slice on the chart, which makes the chart worth very little. [Reading your statement lines](/guides/decoding-bank-statement-lines/) covers what the codes mean and why they are shaped that way. ## The categories are the bank's, not yours A subtler limit: the breakdown uses the bank's category scheme, which was designed to fit every customer and therefore fits nobody in particular. You cannot usually rename them, merge the two that overlap, or split the one that has become a dumping ground. That matters because the whole value of a category is that it maps onto a decision you might actually make. "Shopping" is not a decision. "Groceries" and "things I bought online at eleven at night" are two different decisions, and a scheme that merges them tells you nothing you can act on. [Categories that survive contact with real life](/guides/spending-categories-that-work/) is mostly about building a set small enough to remember and specific enough to mean something — and that set is necessarily yours, not your bank's. ## What a bank app is genuinely better at It is worth being fair about the other direction: - **Immediacy.** Your bank knows about a card payment before anyone else does, including pending transactions that have not settled. - **Acting on the account.** Moving money, freezing a card, changing a limit. No aggregator can do any of this, by design. - **Being the source of truth.** When a figure is disputed, the bank's own record is the one that counts. None of that is in tension with using something else for the overview. They answer different questions. ## Where it leaves you The practical division is straightforward. Your bank's app is for acting on that account. Something that reads all of your accounts is for understanding what is happening across them — and the questions worth asking are almost all of the second kind: what did I spend, what leaves every month regardless, what am I worth once the loans come off. Those need every account in the same picture, which means the tool has to be able to read more than one bank. Notably, this is not a gap your bank is likely to close. Reading a competitor's accounts is possible under Open Banking and a handful of banks across Europe have tried it, but it sits awkwardly with the rest of the business, and the versions that exist tend to be thin. The structural point stands: the institution holding one of your accounts is not the natural place to assemble all of them. [Seeing all your accounts in one place](/guides/connect-all-your-banks-in-one-app/) covers what that setup involves, and [tracking spending across several banks](/guides/track-spending-multiple-banks/) covers the manual version if you would rather not connect anything at all. When it comes to picking the tool itself, [choosing a personal finance app in Portugal](/guides/personal-finance-apps-portugal/) lays out the field.